Examples with ModuleReader java.lang.module.ModuleReader used on opensource projects

Example 1 with ModuleReader

use of java.lang.module.ModuleReader in project Bytecoder by mirkosertic.

the class ModuleReferences method newJModModule.

/**
 * Creates a ModuleReference to a module in a JMOD file.
 */
static ModuleReference newJModModule(ModuleInfo.Attributes attrs, Path file) {
    URI uri = file.toUri();
    Supplier<ModuleReader> supplier = () -> new JModModuleReader(file, uri);
    HashSupplier hasher = (a) -> ModuleHashes.computeHash(file, a);
    return newModule(attrs, uri, supplier, null, hasher);
}

Example 2 with ModuleReader

use of java.lang.module.ModuleReader in project Bytecoder by mirkosertic.

the class BuiltinClassLoader method defineClass.

/**
 * Defines the given binary class name to the VM, loading the class
 * bytes from the given module.
 *
 * @return the resulting Class or {@code null} if an I/O error occurs
 */
private Class<?> defineClass(String cn, LoadedModule loadedModule) {
    ModuleReference mref = loadedModule.mref();
    ModuleReader reader = moduleReaderFor(mref);
    try {
        ByteBuffer bb = null;
        URL csURL = null;
        // locate class file, special handling for patched modules to
        // avoid locating the resource twice
        String rn = cn.replace('.', '/').concat(".class");
        if (reader instanceof PatchedModuleReader) {
            Resource r = ((PatchedModuleReader) reader).findResource(rn);
            if (r != null) {
                bb = r.getByteBuffer();
                csURL = r.getCodeSourceURL();
            }
        } else {
            bb = reader.read(rn).orElse(null);
            csURL = loadedModule.codeSourceURL();
        }
        if (bb == null) {
            // class not found
            return null;
        }
        CodeSource cs = new CodeSource(csURL, (CodeSigner[]) null);
        try {
            // define class to VM
            return defineClass(cn, bb, cs);
        } finally {
            reader.release(bb);
        }
    } catch (IOException ioe) {
        // TBD on how I/O errors should be propagated
        return null;
    }
}

Example 3 with ModuleReader

use of java.lang.module.ModuleReader in project Bytecoder by mirkosertic.

the class BuiltinClassLoader method moduleReaderFor.

// -- miscellaneous supporting methods
/**
 * Returns the ModuleReader for the given module, creating it if needed
 */
private ModuleReader moduleReaderFor(ModuleReference mref) {
    ModuleReader reader = moduleToReader.get(mref);
    if (reader == null) {
        // avoid method reference during startup
        Function<ModuleReference, ModuleReader> create = new Function<>() {

            public ModuleReader apply(ModuleReference moduleReference) {
                try {
                    return mref.open();
                } catch (IOException e) {
                    // load attempting to open the module again.
                    return new NullModuleReader();
                }
            }
        };
        reader = moduleToReader.computeIfAbsent(mref, create);
    }
    return reader;
}

Example 4 with ModuleReader

use of java.lang.module.ModuleReader in project Bytecoder by mirkosertic.

the class Loader method defineClass.

/**
 * Defines the given binary class name to the VM, loading the class
 * bytes from the given module.
 *
 * @return the resulting Class or {@code null} if an I/O error occurs
 */
private Class<?> defineClass(String cn, LoadedModule loadedModule) {
    ModuleReader reader = moduleReaderFor(loadedModule.mref());
    try {
        // read class file
        String rn = cn.replace('.', '/').concat(".class");
        ByteBuffer bb = reader.read(rn).orElse(null);
        if (bb == null) {
            // class not found
            return null;
        }
        try {
            return defineClass(cn, bb, loadedModule.codeSource());
        } finally {
            reader.release(bb);
        }
    } catch (IOException ioe) {
        // TBD on how I/O errors should be propagated
        return null;
    }
}

Example 5 with ModuleReader

use of java.lang.module.ModuleReader in project Bytecoder by mirkosertic.

the class ModuleReferences method newJarModule.

/**
 * Creates a ModuleReference to a possibly-patched module in a modular JAR.
 */
static ModuleReference newJarModule(ModuleInfo.Attributes attrs, ModulePatcher patcher, Path file) {
    URI uri = file.toUri();
    Supplier<ModuleReader> supplier = () -> new JarModuleReader(file, uri);
    HashSupplier hasher = (a) -> ModuleHashes.computeHash(file, a);
    return newModule(attrs, uri, supplier, patcher, hasher);
}